261022596659 has 16 divisors (see below), whose sum is σ = 285236100864. Its totient is φ = 236890029600.

The previous prime is 261022596649. The next prime is 261022596661. The reversal of 261022596659 is 956695220162.

It is a cyclic number.

It is not a de Polignac number, because 261022596659 - 2²⁴ = 261005819443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261022596659.

It is not an unprimeable number, because it can be changed into a prime (261022596649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45463529 + ... + 45469269.

It is an arithmetic number, because the mean of its divisors is an integer number (17827256304).

Almost surely, 2^261022596659 is an apocalyptic number.

261022596659 is a deficient number, since it is larger than the sum of its proper divisors (24213504205).

261022596659 is a wasteful number, since it uses less digits than its factorization.

261022596659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12058.

The product of its (nonzero) digits is 3499200, while the sum is 53.

The spelling of 261022596659 in words is "two hundred sixty-one billion, twenty-two million, five hundred ninety-six thousand, six hundred fifty-nine".